[BUG] Kotlin with snake case parsing from JSON

[catluc]

Bug

A simple json as this one {cod_state_region: "whatever"}, moshi is not able to parse this String to the property in my class. i just read out on moshi, and the correct way to implement the mapping for snake_case and camel case in kotlin is to use the KotlinJsonAdapterFactory class.

At the moment of writing this i am on openapi-generator-maven-plugin V4.0.0 beta 3 and I tested the last release v4.0.0 and the problem is still the same

Description

My suggestion is to change the ApiClient mustache.
This method

protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String? = JsonMediaType): T? {
       if(body == null) {
           return null
       }
       val bodyContent = body.string()
       if (bodyContent.length == 0) {
           return null
       }
       return when(mediaType) {
           JsonMediaType -> Moshi.Builder().add(object {
                   @ToJson
                   fun toJson(uuid: UUID) = uuid.toString()
                   @FromJson
                   fun fromJson(s: String) = UUID.fromString(s)
               })
               //.add(ByteArrayAdapter())
               .build().adapter(T::class.java).fromJson(bodyContent)
           else ->  TODO("responseBody currently only supports JSON body.")
       }
   }

Into this method:

protected inline fun <reified T: Any?> responseBody(body: ResponseBody?, mediaType: String = JsonMediaType): T? {
        if(body == null) return null
        return when(mediaType) {
            JsonMediaType -> Moshi.Builder()
                    .add(KotlinJsonAdapterFactory())
                .build().adapter(T::class.java).fromJson(body.source())
            else -> TODO("responseBody currently only supports JSON body.")
        }
    }

[karismann]

hello @catluc, could you please retry with latest snapshot version ? that should be fixed. Thanks.

[catluc]

just checked this commit: [Kotlin] Fix parse error when using custom field names with @JSON and it looks ok to me